M63.86
⚠ Non-billable
Disorders of muscle in diseases classified elsewhere, lower leg
ICD-10-CM · FY2026 · Diseases of the Musculoskeletal System and Connective Tissue
Code
M63.86
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Musculoskeletal System and Connective Tissue
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code M63.86?
ICD-10-CM code M63.86 represents Disorders of muscle in diseases classified elsewhere, lower leg. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Musculoskeletal System and Connective Tissue chapter, effective October 1, 2025 – September 30, 2026.
Is M63.86 billable?
No. M63.86 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is M63.86 in?
M63.86 belongs to the Diseases of the Musculoskeletal System and Connective Tissue chapter (M00–M99) of ICD-10-CM.
Related codes in the M63 category
M63
Disorders of muscle in diseases classified elsewhere
Non-billable
M63.8
Disorders of muscle in diseases classified elsewhere
Non-billable
M63.80
Disorders of muscle in diseases classified elsewhere, unspecified site
Billable
M63.81
Disorders of muscle in diseases classified elsewhere, shoulder
Non-billable
M63.82
Disorders of muscle in diseases classified elsewhere, upper arm
Non-billable
M63.83
Disorders of muscle in diseases classified elsewhere, forearm
Non-billable
M63.84
Disorders of muscle in diseases classified elsewhere, hand
Non-billable
M63.85
Disorders of muscle in diseases classified elsewhere, thigh
Non-billable
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